Push-plate for emergency-exit locks.



J. H. SHAW.

PUSH PLATE FOR EMERGENCY EXII LOCKS. APPLICATION FILED JUNE 24.1916,

1,279,456. Patented Sept. 17, 1918.

W/ TNESSES JOHN H. SHAW, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

PUSH-PLATE FOR EMERGENCY-EXITLOCKS.

mg is a full, clear, and exact description.

This invention relates to push plates or push bars for emergency exit looks or panic bolts, and the primary object which I have in view is the provision of a device of this character which can be produced at a low cost and wherein one or more of the longitudinal edges of the plate are not only finished off in an ornamental manner but so constructed that the plate will present smooth rounded edges which will not cut or hurt the hands of a person who grasps the plate for actuating the bolt mechanism or otherwlse.

To this and other ends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawing,

Figure 1 is a face vlew of a bar or plate embodying my improvements;

Fig. 2 is an end elevation thereof;

Fig. 3 is an enlarged section on line 33 of Fig. l; and

Fig. 4: is a fragmentary perspective view of one of the tubular edge members.

As previously stated, my invention has particular reference to bars or plates used as push plates for panic bolt locks, and my improvements are especially applicable to sheet metal plates of this character. It is inadvisable to use a thin plate with plain edges, for the latter are too sharp for the purpose in view. On the other hand, if the edges of the plate are bent or curved along the margins a special rolling or bending operation is necessitated, which is rather difficult and expensive.

In carrying out my improvements, I use a sheet metal plate 5 of elongated form having the required dimensions. In the example shown, this plate is given an arc-like curve in cross-section, and the side edges are reinforced by tubular members forming guards or housings for the same which inclose such side edges and are suitably secured to the plate. In the example illustrated, the plate is reinforced at itsupper Specification of Letters Batent. I Patented Sept, 17,

Application filed June 24, 1916. Serial N 0. 105,697.

site the slit or kerf in the latter.

edge by a tube 6, and at itslower edge by a larger tube 7 but the relative sizesof these tubes is not important. Each tubehas a longitudinal slit or kerf 8, as shown in Fig.

4B, which slit or kerf is of substantially the same width as the thickness of the-plate 5. This enables one of the edges of the plate 5 to be inserted through the slit, asshown" in Figs'.'2 and 3, after which the tube in question is permanently secured to the plate, preferably bv brazing or soldering.

It will be observed that in the form shown, each of the marginal portions of the late 5 extends diametrically across the interior of one of the tubes 6, 7, and that the extreme edge portion abuts against the inner cylindrical surface of the tube at a point oppo- In the particular example shown, the tubes, 6, 7, I

are secured at 9 to the concave face of the plate 5 by means of hard solder. This solder is interposed between one wall 10 of the kerf 8 and the opposing surface of the plate 5. There is no solder used on the convex face of the plate 5, which is intended to be the front face of the push plate, and consequently the front of the push plate can be given a very finely finished appearance.

It will be understood that by having the extreme edges of the plate 5 in abutment with the inner surfaces of the tubes at points opposite the slits or kerfs, the tubes cannot turn or wabble on the marginal pore tions of the plate as they are held firmly in the proper. position by solder or other connecting means.

From the foregoing, it will be understood, that by my invention, one or more side edges of a push plate for emergency exit locks may be readily finished off in an ornamental .manner at the same time that the whole plate is considerably reinforced and strengthened and that the plate will present smooth rounded upper and lower surfaces which will not cut or feel uncomfortable to the hand of a person whograsps the plate. for actuating the bolt mechanism; I

Without limiting myself to the precise construction shown, I claim 1. A push plate for emergency exit locks, comprising a plate having plain longitudinal edges, tubes having longitudinal slits through which the longitudinal edge portions of said plate are inserted, the extreme longitudinal edges of the plate being in abutment With the interior surfaces of the respective tubes, and means for securing one edge of each tube formed by the slit therein to the plate and to the same face of the latter; substantially as described.

2. A push plate for emergency exit locks, comprising an elongated metal plate having plain longitudinal edges, tubes having longitudinal slits through Which the longitudinal edge portions of said plate are inserted, and means for securing each tube to the plate, both of said last named means located at the same face of the plate so as to be invisible at the other face thereof; substantially as described. 7

3. A push plate for emergency exit locks,

comprising an elongated plate curved in cross-section having plain longitudinal edges, tubes having longitudinal slits through which the longitudinal edge portions of said plate are inserted, said tubes inclosing the edges of the plate and presenting smooth rounded surfaces to the grasp of a person Who actuates the lock mechanism by means of said plate and means for securing each tube to the plate, both of said last named means located at the concave face of said plate; substantially as described.

In Witness Whereof I have hereunto set my hand on the 22nd day of June, 1916.

JOHN H. SHAW.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. O. 

